Unfortunately I have slightly noodle-y biceps and large forearms - from playing a lot of racket sports and golf, rather than from eating Popeye quantities of spinach. So whilst the fit was perfect from the elbow down, they slip a little at the top of my arm.

I can't fault the product design or quality in any way. And I realise that there's a limit to how much a compression product can do to span the range of human shapes that exist!

Customer service was first class so I remain a very happy customer (and other products from 2XU have fitted me fine); I've just ordered a couple more from their compression range, which should tell you everything you need to know about this customer's satisfaction.